script.js

'use strict';

// Data
const account1 = {
  owner: 'Jonas Schmedtmann',
  movements: [200, 450, -400, 3000, -650, -130, 70, 1300],
  interestRate: 1.2, // %
  pin: 1111,
};

const account2 = {
  owner: 'Jessica Davis',
  movements: [5000, 3400, -150, -790, -3210, -1000, 8500, -30],
  interestRate: 1.5,
  pin: 2222,
};

const account3 = {
  owner: 'Steven Thomas Williams',
  movements: [200, -200, 340, -300, -20, 50, 400, -460],
  interestRate: 0.7,
  pin: 3333,
};

const account4 = {
  owner: 'Sarah Smith',
  movements: [430, 1000, 700, 50, 90],
  interestRate: 1,
  pin: 4444,
};

const accounts = [account1, account2, account3, account4];

// Elements
const labelWelcome = document.querySelector('.welcome');
const labelDate = document.querySelector('.date');
const labelBalance = document.querySelector('.balance__value');
const labelSumIn = document.querySelector('.summary__value--in');
const labelSumOut = document.querySelector('.summary__value--out');
const labelSumInterest = document.querySelector('.summary__value--interest');
const labelTimer = document.querySelector('.timer');

const containerApp = document.querySelector('.app');
const containerMovements = document.querySelector('.movements');

const btnLogin = document.querySelector('.login__btn');
const btnTransfer = document.querySelector('.form__btn--transfer');
const btnLoan = document.querySelector('.form__btn--loan');
const btnClose = document.querySelector('.form__btn--close');
const btnSort = document.querySelector('.btn--sort');

const inputLoginUsername = document.querySelector('.login__input--user');
const inputLoginPin = document.querySelector('.login__input--pin');
const inputTransferTo = document.querySelector('.form__input--to');
const inputTransferAmount = document.querySelector('.form__input--amount');
const inputLoanAmount = document.querySelector('.form__input--loan-amount');
const inputCloseUsername = document.querySelector('.form__input--user');
const inputClosePin = document.querySelector('.form__input--pin');

const displayMovements = function (movements, sort = false) {
  containerMovements.innerHTML = '';

  const movs = sort ? movements.slice().sort((a, b) => a - b) : movements;

  movs.forEach(function (mov, i) {
    const type = mov > 0 ? 'deposit' : 'withdrawal';
    const html = `
    <div class="movements__row">
          <div class="movements__type movements__type--${type}">
          ${i + 1}${type}</div>
          <div class="movements__value">${mov}€</div>
        </div>
      `;
    containerMovements.insertAdjacentHTML('afterbegin', html);
  });
};

const calcDisplayBalance = function (acc) {
  acc.balance = acc.movements.reduce(function (acc, cur, i, arr) {
    // console.log(`Iteration ${i}: ${acc}`);
    return acc + cur;
  }, 0);

  labelBalance.textContent = `${acc.balance}€`;
};

const calcDisplaySummary = function (acc) {
  const incomes = acc.movements
    .filter(mov => mov > 0)
    .reduce((acc, mov) => acc + mov, 0);
  labelSumIn.textContent = `${incomes}€`;

  const outgoing = acc.movements
    .filter(mov => mov < 0)
    .reduce((acc, mov) => acc + mov, 0);
  labelSumOut.textContent = `${Math.abs(outgoing)}€`;

  const interest = acc.movements
    .filter(mov => mov > 0)
    .map(deposite => (deposite * acc.interestRate) / 100)
    .filter((int, i, arr) => {
      return int >= 1;
    })
    .reduce((acc, int) => acc + int, 0);
  labelSumInterest.textContent = `${interest}€`;
};

// calcDisplaySummary(account1.movements);

const createUsernames = function (accs) {
  accs.forEach(function (acc) {
    acc.username = acc.owner
      .toLowerCase()
      .split(' ')
      .map(function (name) {
        return name[0];
      })
      .join('');
  });
};

createUsernames(accounts);
console.log(accounts);

const updateUI = function (acc) {
  //Display movements
  displayMovements(acc.movements);
  //Display balance
  calcDisplayBalance(acc);
  //Display summary
  calcDisplaySummary(acc);
};

let currentAccount;
//Event handlers
btnLogin.addEventListener('click', function (e) {
  //prevent form from submitting
  e.preventDefault();
  currentAccount = accounts.find(
    acc => acc.username === inputLoginUsername.value
  );
  console.log(currentAccount);

  if (currentAccount?.pin === Number(inputLoginPin.value)) {
    //Display UI and message
    labelWelcome.textContent = `Welcome back ${
      currentAccount.owner.split(' ')[0]
    }`;

    containerApp.style.opacity = 100;

    inputLoginUsername.value = inputLoginPin.value = '';
    inputLoginPin.blur();

    //Update UI
    updateUI(currentAccount);
  }
});

btnTransfer.addEventListener('click', function (e) {
  //prevent reload of the page
  e.preventDefault();
  const amount = Number(inputTransferAmount.value);
  const receiverAcc = accounts.find(
    acc => acc.username === inputTransferTo.value
  );
  // console.log(amount, receiverAcc);
  inputTransferAmount.value = inputTransferTo.value = '';

  if (
    amount > 0 &&
    receiverAcc &&
    currentAccount.balance >= amount &&
    receiverAcc.username !== currentAccount.username
  ) {
    //Doing the transfer
    currentAccount.movements.push(-amount);
    receiverAcc.movements.push(amount);

    //Update UI
    updateUI(currentAccount);
  }
});

//loan functionality -->some method
btnLoan.addEventListener('click', function (e) {
  e.preventDefault();
  const amount = Number(inputLoanAmount.value);
  if (amount > 0 && currentAccount.movements.some(mov => mov >= amount * 0.1)) {
    //Add the movement
    currentAccount.movements.push(amount);

    // update UI
    updateUI(currentAccount);
  }
  inputLoanAmount.value = '';
});

btnClose.addEventListener('click', function (e) {
  e.preventDefault();

  if (
    inputCloseUsername.value === currentAccount.username &&
    Number(inputClosePin.value) === currentAccount.pin
  ) {
    const index = accounts.findIndex(
      acc => acc.username === currentAccount.username
    );
    console.log(index);
    accounts.splice(index, 1); //Deleted the account from accounts array

    //Hide UI
    containerApp.style.opacity = 0;
  }
  inputCloseUsername.value = inputClosePin.value = '';
});

let sorted = false;
btnSort.addEventListener('click', function (e) {
  e.preventDefault();
  displayMovements(currentAccount.movements, !sorted);
  sorted = !sorted;
});

const currencies = new Map([
  ['USD', 'United States dollar'],
  ['EUR', 'Euro'],
  ['GBP', 'Pound sterling'],
]);

const movements = [200, 450, -400, 3000, -650, -130, 70, 1300];

//find method-->usually to find one element
const account = accounts.find(acc => acc.owner === 'Jessica Davis');
console.log(account);